Lake Bonaventure is a lake fed by the Saint Croix River. The Acme smeting company discharges the heavy metal nickel into the lake. The easy way to model the concentration of nickel is to assume the lake is well mixed. It isn’t. The lake has a mean depth of 30m, and during the summer a surface epilimnion of 5m develops, which breaks down for the winter. (no calculations are required to answer the questions below) (A) Given what you know about the hydrology of lakes, what differences in concentration would there be if the smelter discharges at the surface or at a depth of 30m? (B) How would concentrations vary in the lake throughout the year? (C) What if you factor in the fact that the flow of the Saint Croix River is less during the winter?
Lake Bonaventure is a lake fed by the Saint Croix River. The Acme smeting company discharges the heavy metal nickel into the lake. The easy way to model the concentration of nickel is to assume the lake is well mixed. It isn’t. The lake has a mean depth of 30m, and during the summer a surface epilimnion of 5m develops, which breaks down for the winter. (no calculations are required to answer the questions below)
(A) Given what you know about the hydrology of lakes, what differences in concentration would there be if the smelter discharges at the surface or at a depth of 30m?
(B) How would concentrations vary in the lake throughout the year?
(C) What if you factor in the fact that the flow of the Saint Croix River is less during the winter?
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